Audio issues

What changed from Dharma to Eden to make audio no longer work (I know this was a completely different platform)? Loaded Dharma Live and worked fine. Switched to Eden Ubuntu and audio no longer works. Only been using XBMC for about 2 months now so huge learning curve...I have read and tried every audio issue I can find on the forms without a fix. Should I try a reload of XBMC, go back to dharma, or any other thoughts?

Guess it makes sense it should be moved to specific thread and Windows removed from title. Forgot when I loaded XBMCbuntu directly onto system via USB I am now using Ubunts OS. Thanks for clarifying and directing thread to correct location.

I have seen some commenting on conflicts regarding pulseaudio, but it is not loaded on my system. Seached for pulseaudio in directories and no files found.
no menu, video, or music sounds. Video loads from hard rives (.mkv files) via smb network.

Update: found the how-to: setup audio over HDMI on nVidia GeForce on Wiki and all is good! Guess most everything is there if you just spend the time finding the right links! For me after I had made all my changes, the last step apparently was unmuting in alsamixer.